A woman is received first-aid after a car accident ran into a crowd of protesters in Charlottesville, VA on August 12, 2017. A picturesque Virginia city braced Saturday for a flood of white nationalist demonstrators as well as counter-protesters, declaring a local emergency as law enforcement attempted to quell early violent clashes. / AFP PHOTO / PAUL J. RICHARDSPAUL J. RICHARDS/AFP/Getty Images less

A woman is received first-aid after a car accident ran into a crowd of protesters in Charlottesville, VA on August 12, 2017. A picturesque Virginia city braced Saturday for a flood of white nationalist ... more

Photo: PAUL J. RICHARDS / AFP/Getty Images

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Rescue personnel help a woman injured when a car ran into a large group of people protesting a white nationalist rally in Char lottesville, Va.

Rescue personnel help a woman injured when a car ran into a large group of people protesting a white nationalist rally in Char lottesville, Va.

Photo: Steve Helber / Associated Press

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A counter demonstrator uses a lighted spray can against a white nationalist demonstrator at the entrance to Lee Park in Charlottesville, Va., Saturday, Aug. 12, 2017. Gov. Terry McAuliffe declared a state of emergency and police dressed in riot gear ordered people to disperse after chaotic violent clashes between white nationalists and counter protestors. (AP Photo/Steve Helber) less

A counter demonstrator uses a lighted spray can against a white nationalist demonstrator at the entrance to Lee Park in Charlottesville, Va., Saturday, Aug. 12, 2017. Gov. Terry McAuliffe declared a state of ... more

Photo: Steve Helber / Associated Press

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CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" clash with police as they are forced out of Lee Park after the "Unite the Right" rally was declared an unlawful gathering August 12, 2017 in Charlottesville, Virginia. After clashes with anti-facist protesters and police the rally was declared an unlawful gathering and people were forced out of Lee Park, where a statue of Confederate General Robert E. Lee is slated to be removed. (Photo by Chip Somodevilla/Getty Images) less

CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" clash with police as they are forced out of Lee Park after the "Unite the Right" rally was declared an unlawful ... more

Photo: Chip Somodevilla / Getty Images

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Confrontations in the streets of Charlottesville, Va., where white nationalists faced counterprotestors at a planned protest, billed as a ìUnite the Rightî rally, Aug. 12, 2017. The demonstration, which both organizers and critics had said was the largest gathering of white nationalists in recent years, turned violent almost immediately; a car that plowed into a crowd of counterprotesters later left at least one person dead and at least 19 injured. (Matt Eich/The New York Times) less

Confrontations in the streets of Charlottesville, Va., where white nationalists faced counterprotestors at a planned protest, billed as a ìUnite the Rightî rally, Aug. 12, 2017. The demonstration, which both ... more

Photo: MATT EICH / NYT

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CHARLOTTESVILLE, VA - AUGUST 12: Jessica Mink (R) embraces Nicole Jones (L) during a vigil for those who were injured and died when a car plowed into a crowd of anti-fascist counter-demonstrators marching near a downtown shopping area August 12, 2017 in Charlottesville, Virginia. The car allegedly plowed through a crowd, and at least one person has died from the incident, following the shutdown of the 'Unite the Right' rally by police after white nationalists, neo-Nazis and members of the 'alt-right' and counter-protesters clashed near Lee Park, where a statue of Confederate General Robert E. Lee is slated to be removed. (Photo by Win McNamee/Getty Images) less

CHARLOTTESVILLE, VA - AUGUST 12: Jessica Mink (R) embraces Nicole Jones (L) during a vigil for those who were injured and died when a car plowed into a crowd of anti-fascist counter-demonstrators marching near ... more

Photo: Win McNamee / Getty Images

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CHARLOTTESVILLE, VA - AUGUST 12: White nationalist Richard Spencer (C) and his supporters clash with Virginia State Police in Lee Park after the "United the Right" rally was declared an unlawful gathering August 12, 2017 in Charlottesville, Virginia. Hundreds of white nationalists, neo-Nazis and members of the "alt-right" clashed with anti-facist protesters and police as they attempted to hold a rally in Lee Park, where a statue of Confederate General Robert E. Lee is slated to be removed. (Photo by Chip Somodevilla/Getty Images)

CHARLOTTESVILLE, VA - AUGUST 12: White nationalist Richard Spencer (C) and his supporters clash with Virginia State Police in Lee Park after the "United the Right" rally was declared an unlawful gathering

Protesters march in Charlottesville, Virginia on August 12, 2017. A picturesque Virginia city braced Saturday for a flood of white nationalist demonstrators as well as counter-protesters, declaring a local emergency as law enforcement attempted to quell early violent clashes. / AFP PHOTO / PAUL J. RICHARDSPAUL J. RICHARDS/AFP/Getty Images less

Protesters march in Charlottesville, Virginia on August 12, 2017. A picturesque Virginia city braced Saturday for a flood of white nationalist demonstrators as well as counter-protesters, declaring a local ... more

Photo: PAUL J. RICHARDS / AFP/Getty Images

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White nationalists participating in a “Unite the Right” rally in Charlottesville, Va., Aug. 12, 2017. After the rally descended into scenes of intense violence and was subsequently dispersed, a car plowed into a crowd of counterprotesters, killing at least one person and injuring at least 19 others. (Edu Bayer/The New York Times) less

White nationalists participating in a “Unite the Right” rally in Charlottesville, Va., Aug. 12, 2017. After the rally descended into scenes of intense violence and was subsequently dispersed, a car plowed ... more

Photo: EDU BAYER / NYT

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CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" clash with counter-protesters as they enter Lee Park during the "Unite the Right" rally August 12, 2017 in Charlottesville, Virginia. After clashes with anti-fascist protesters and police the rally was declared an unlawful gathering and people were forced out of Lee Park, where a statue of Confederate General Robert E. Lee is slated to be removed. (Photo by Chip Somodevilla/Getty Images) less

CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" clash with counter-protesters as they enter Lee Park during the "Unite the Right" rally August 12, 2017 in ... more

Photo: Chip Somodevilla / Getty Images

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CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" take refuge in an alleyway after being hit with pepper spray after the "Unite the Right" rally was declared an unlawful gathering August 12, 2017 in Charlottesville, Virginia. After clashes with anti-facist protesters and police the rally was declared an unlawful gathering and people were forced out of Lee Park, where a statue of Confederate General Robert E. Lee is slated to be removed. (Photo by Chip Somodevilla/Getty Images) less

CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" take refuge in an alleyway after being hit with pepper spray after the "Unite the Right" rally was declared an ... more

Photo: Chip Somodevilla / Getty Images

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CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" exchange insluts with counter-protesters as they attempt to guard the entrance to Lee Park during the "Unite the Right" rally August 12, 2017 in Charlottesville, Virginia. After clashes with anti-fascist protesters and police the rally was declared an unlawful gathering and people were forced out of Lee Park, where a statue of Confederate General Robert E. Lee is slated to be removed. (Photo by Chip Somodevilla/Getty Images) less

CHARLOTTESVILLE, VA - AUGUST 12: White nationalists, neo-Nazis and members of the "alt-right" exchange insluts with counter-protesters as they attempt to guard the entrance to Lee Park during the "Unite the ... more

Photo: Chip Somodevilla / Getty Images

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Bodies fly into the air as a vehicle drives into a group of people protesting a white nationalist rally in Charlottesville, Va. One person was killed, and at least two dozen were injured.

Bodies fly into the air as a vehicle drives into a group of people protesting a white nationalist rally in Charlottesville, Va. One person was killed, and at least two dozen were injured.

CHARLOTTESVILLE, Va. — A car plowed into a crowd of people peacefully protesting a white nationalist rally Saturday in a Virginia college town, killing one person, hurting more than a dozen others and ratcheting up tension in a day full of violent confrontations.

Shortly after, a Virginia State Police helicopter that officials said was assisting with the rally crashed outside Charlottesville, killing the pilot and a trooper.

The chaos boiled over at what is believed to be the largest group of white nationalists to come together in a decade. The governor declared a state of emergency, and police dressed in riot gear ordered people out. The group had gathered to protest plans to remove a statue of Confederate Gen. Robert E. Lee, and others arrived to protest the racism.

Matt Korbon, a 22-year-old University of Virginia student, said several hundred counterprotesters were marching when “suddenly there was just this tire screeching sound.” A silver Dodge Challenger smashed into another car, then backed up, barreling through “a sea of people.”

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The impact hurled people into the air. Those left standing scattered, screaming and running for safety in different directions.

The driver was later identified by police as James Alex Fields Jr. of Ohio. Police say Fields, 20, has been charged with second-degree murder, three counts of malicious wounding, and one count related to leaving the scene. A bond hearing is scheduled for Monday.

Fields’ mother, Samantha Bloom, said Saturday night that she knew her son was attending a rally in Virginia but didn’t know it was for white supremacists.

“I thought it had something to do with Trump. Trump’s not a white supremacist,” Bloom said.

“He had an African American friend so ...,” she said before her voice trailed off. She added that she’d be surprised if her son’s views were that far right.

Bloom, who became visibly upset as she learned of the injuries and deaths at the rally, said she and her son had just moved to the Toledo area from the northern Kentucky city of Florence. She said that’s where Fields grew up. She relocated to Ohio for work.

Late Saturday, the Department of Justice announced the opening of a federal civil rights investigation into the deadly car attack. Attorney General Jeff Sessions said that the FBI’s Richmond field office and Rick Mountcastle, the U.S. attorney for the Western District of Virginia, will lead the investigation.

“The violence and deaths in Charlottesville strike at the heart of American law and justice,” Sessions said in a statement. “When such actions arise from racial bigotry and hatred, they betray our core values and cannot be tolerated.”

The turbulence began Friday night, when the white nationalists carried torches though the University of Virginia campus. It quickly spiraled into violence Saturday morning. Hundreds of people threw punches, hurled water bottles and unleashed chemical sprays. At least three more men have been arrested in connection with the protests.

The Virginia State Police announced late Saturday that Troy Dunigan, a 21-year-old from Chattanooga, Tenn., was charged with disorderly conduct; Jacob L. Smith, a 21-year-old from Louisa, Va., was charged with assault and battery; and James M. O’Brien, 44, of Gainesville, Fla., was charged with carrying a concealed handgun.

City officials said treated 35 patients altogether, 19 of whom were injured in the car crash.

State Police said in a statement that the helicopter was “assisting public safety resources with the ongoing situation” when it crashed in a wooded area. The pilot, Lieutenant H. Jay Cullen, 48, of Midlothian, Va., and Trooper-Pilot Berke M.M. Bates of Quinton, Va., died at the scene.

President Trump condemned “in the strongest possible terms” what he called an “egregious display of hatred, bigotry and violence on many sides” after the clashes. He called for “a swift restoration of law and order and the protection of innocent lives.”

Trump said he had spoken with the governor of Virginia, Terry McAuliffe, and “we agreed that the hate and the division must stop and must stop right now.”

But some of the white nationalists cited Trump’s victory as validation for their beliefs, and Trump’s critics pointed to the president’s racially tinged rhetoric as exploiting the nation’s festering racial tension.

Conservative blogger Jason Kessler had called for what he termed a “pro-white” rally in Charlottesville, sparked by the monument decision. White nationalists and their opponents promoted the event for weeks.

Oren Segal, who directs the Anti-Defamation League’s Center on Extremism, said multiple white power groups gathered in Charlottesville, including members of neo-Nazi organizations, racist skinhead groups and Ku Klux Klan factions.

The white nationalist organizations Vanguard America and Identity Evropa; the Southern nationalist League of the South; the National Socialist Movement; the Traditionalist Workers Party; and the Fraternal Order of Alt Knights also were on hand, he said, along with several groups with a smaller presence.

On the other side, antifascist demonstrators also gathered in Charlottesville, but they generally aren’t organized like white nationalist factions, said Heidi Beirich of the Southern Poverty Law Center.

Many others were just locals caught in the fray.

Colleen Cook, 26, stood on a curb shouting at the rally attendees to go home.

Cook, a teacher who attended the University of Virginia, said she sent her son, who is black, out of town for the weekend. “This isn’t how he should have to grow up,” she said.

It’s the latest hostility in Charlottesville since the city about 100 miles outside of Washington, D.C., voted this year to remove a statue of Lee.

In May, a torch-wielding group that included prominent white nationalist Richard Spencer gathered around the statue for a nighttime protest, and in July, about 50 members of a North Carolina KKK group traveled there for a rally, where they were met by hundreds of counterprotesters.

Kessler said last week that the rally was partly about the removal of Confederate symbols but also about free speech and “advocating for white people.”

Charlottesville Mayor Michael Signer said he was disgusted that the white nationalists had come to his town and blamed Trump for inflaming racial prejudices.

“I’m not going to make any bones about it. I place the blame for a lot of what you’re seeing in America today right at the doorstep of the White House and the people around the president,” he said.